Bump transformers from 4.36.2 to 4.38.0 in /examples/multimodal

Bumps [transformers](https://github.com/huggingface/transformers) from 4.36.2 to 4.38.0.
- [Release notes](https://github.com/huggingface/transformers/releases)
- [Commits](huggingface/transformers@v4.36.2...v4.38.0)

---
updated-dependencies:
- dependency-name: transformers
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

examples/multimodal/requirements-vila.txt

@@ -1,2 +1,2 @@
 git+https://github.com/bfshi/scaling_on_scales.git
-transformers==4.36.2
+transformers==4.38.0